Layered Light-Emitting Display Structure for High Pixel Density
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Solution Overview
Problem
Display devices for VR, AR, or MR applications face challenges with low resolution and color reproducibility, leading to a weak sense of reality and immersion, necessitating high-resolution and high-color-reproducibility solutions.
Innovation Solution
A display device structure with specific conductive and insulating layers, including a light-emitting element and conductive layers with aligned side surfaces, and a method of fabrication using sacrificial layers and resist masks to form precise light-emitting elements, enabling high-resolution and high-color-reproducibility displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional display panel structure is used, then the device can be manufactured with standard processes, but the resolution is insufficient for VR/AR/SR/MR applications requiring high detail and immersion
Solution Approach 1:
The display device is segmented into multiple functional layers including first and second insulating layers, multiple conductive layers (first, second, third), a light-emitting element with its own layered structure (fourth conductive layer, second layer, third layer, fifth conductive layer), and various openings. This segmentation allows each layer to be optimized for specific functions while achieving overall high resolution
Solution Approach 2:
The patent transitions from conventional planar display structures to a multi-dimensional layered architecture where conductive layers are positioned at different heights and depths (some over insulating layers, some within the light-emitting element). This dimensional complexity enables higher resolution by allowing more precise control of pixel structures in three-dimensional space
2Manufacturing precision
If standard light-emitting structures are used, then manufacturing is simpler, but color reproducibility is insufficient for high-fidelity display applications
Solution Approach 1:
Different layers are assigned specific materials and functions tailored to their local requirements: the light-emitting element contains light-emitting compounds for color generation, conductive layers use materials optimized for electrical conduction, and insulating layers provide electrical isolation. This local optimization of material properties enables precise color control while maintaining manufacturability through specialized process steps for each layer type
Solution Approach 2:
The display device employs composite material structures where multiple materials are combined in specific layers and configurations. The light-emitting element combines conductive layers with light-emitting compounds, while the overall structure integrates organic and inorganic materials. These composite structures enable precise color reproduction by combining the optical and electrical properties of different materials
3Manufacturing precision
If high resolution is achieved through increased pixel density, then display quality improves, but color mixing between adjacent pixels increases reducing color accuracy
Solution Approach 1:
Insulating layers are positioned between adjacent light-emitting elements and conductive layers to physically segment and electrically isolate pixel structures. This segmentation prevents color mixing by creating clear boundaries between adjacent pixels while maintaining high pixel density
Solution Approach 2:
Insulating layers act as intermediary barriers between adjacent conductive layers and light-emitting elements. These intermediary structures prevent electrical and optical interference between neighboring pixels, thereby preventing color mixing while enabling high-resolution display
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves a display device with extremely high resolution, high color reproducibility, and high luminance, enhancing the sense of reality and immersion in VR, AR, or MR applications.
Implementation Method 1
By voltage application to this element, light emission can be obtained from the light-emitting organic compound
Data Source
AI summary
A high-resolution display device and a fabrication method thereof are provided. The display device includes a first insulating layer; a light-emitting element and a first conductive layer over the first insulating layer; a first layer over the first conductive layer; a second conductive layer over the first layer; a second insulating layer over the light-emitting element, the second conductive layer, and the first insulating layer; and a third conductive layer over the second insulating layer. The light-emitting element includes a fourth conductive layer, a second layer over the fourth conductive layer, a third layer over the second layer, and a fifth conductive layer over the third layer. The third conductive layer includes a region in contact with the second conductive layer through a first opening formed in the second insulating layer and a region in contact with the fifth conductive layer through a second opening formed in the second insulating layer; the second layer contains a light-emitting compound; the first conductive layer and the fourth conductive layer contain the same material; the first layer and the third layer contain the same material; and the second conductive layer and the fifth conductive layer contain the same material.